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Sulfur-doped carbon material or sulfur-nitrogen-doped carbon material and preparation method and application thereof

A technology of carbon materials and aza-carbon, which is applied in the field of sulfur-as-carbon materials or sulfur-aza-carbon materials and their preparation, can solve the problems of low-cost electrochemical performance, high oxygen reduction overpotential, etc., and achieve convenient batch preparation and overall Effect of cost reduction and production cost reduction

Inactive Publication Date: 2012-07-04
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the problem of high oxygen reduction overpotential in existing carbon materials used in lithium-air batteries, the present invention provides a sulfur-assorted carbon material or a sulfur-nitrogen-assorted carbon material, with carbon black (carbon black, and Carbon black, an amorphous carbon) as carbon source, doped with sulfur or sulfur-nitrogen, low cost and excellent electrochemical performance

Method used

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  • Sulfur-doped carbon material or sulfur-nitrogen-doped carbon material and preparation method and application thereof
  • Sulfur-doped carbon material or sulfur-nitrogen-doped carbon material and preparation method and application thereof
  • Sulfur-doped carbon material or sulfur-nitrogen-doped carbon material and preparation method and application thereof

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Effect test

Embodiment 1

[0056] 1. Preparation of S carbon

[0057] (1) Take a certain amount of S elemental substance and carbon black (Ketjen black EC600JD), and feed them according to the mass ratio S: carbon black = 15:85.

[0058] (2) Grind the S element and carbon black in a mortar for a little, so that the S element and carbon black are preliminarily mixed evenly.

[0059] (3) Pour the preliminarily homogeneous mixture in step (2) into secondary deionized water, and form a uniformly dispersed suspension (gel-like) by means of alternating stirring and ultrasonic waves.

[0060] (4) Dry the uniformly dispersed suspension in step (3) in an oven at 60° C., and then grind the dried mixture finely with a mortar.

[0061] (5) Transfer the finely ground mixture in step (4) to enamel, put it into a tube furnace, and calcinate it at 900° C. for 5 hours under an Ar atmosphere to obtain a product, which is proved to be a carbonaceous carbon material by XRD analysis, XRD Spectrum such as figure 1 , figu...

Embodiment 2

[0077] 1. Preparation of S carbon

[0078] (1) Take a certain amount of S element and carbon black (Ketjen black EC600JD), and feed them according to the mass ratio S: carbon black = 25:75.

[0079] (2) Grind the S element and carbon black in a mortar for a little, so that the S element and carbon black are preliminarily mixed evenly.

[0080] (3) Pour the preliminarily homogeneous mixture in step (2) into secondary deionized water, and form a uniformly dispersed suspension (gel-like) by means of alternating stirring and ultrasonic waves.

[0081] (4) Dry the uniformly dispersed suspension in step (3) in an oven at 60° C., and then grind the dried mixture finely with a mortar.

[0082] (5) Transfer the finely ground mixture in step (4) to enamel, put it into a tube furnace, and calcinate it at 900° C. for 5 hours under an Ar atmosphere to obtain a product, which is proved to be a carbonaceous carbon material by XRD analysis, XRD Spectrum such as Figure 7 , Figure 7 Both ...

Embodiment 3

[0091] 1. Preparation of S carbon

[0092] (1) Take a certain amount of S elemental substance and carbon black (Ketjen black EC600JD), and feed them according to the mass ratio S: carbon black = 2:98.

[0093] (2) Grind the S element and carbon black in a mortar for a little, so that the S element and carbon black are preliminarily mixed evenly.

[0094] (3) Pour the preliminarily homogeneous mixture in step (2) into secondary deionized water, and form a uniformly dispersed suspension (gel-like) by means of alternating stirring and ultrasonic waves.

[0095] (4) Dry the uniformly dispersed suspension in step (3) in an oven at 60° C., and then grind the dried mixture finely with a mortar.

[0096] (5) Transfer the finely ground mixture in step (4) to enamel, put it into a tube furnace, and calcinate at 900° C. for 5 hours under an Ar atmosphere to obtain a product, which is proved to be a S carbonaceous material through XRD analysis, wherein The S impurity is 0.1wt.%, and the...

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Abstract

The invention discloses a sulfur-doped carbon material or a sulfur-nitrogen-doped carbon material. The sulfur-doped carbon material is formed by doping sulfur into a carbon material, or the sulfur-nitrogen-doped carbon material is formed by doping the sulfur and nitrogen into the carbon material, wherein the carbon material is carbon black. The material can be used as or in an electrode material for manufacturing a battery and has excellent electrochemical performance. The invention further discloses a preparation method of the sulfur-doped carbon material or the sulfur-nitrogen-doped carbon material, and the preparation method comprises the following steps of: evenly mixing a sulfur doping raw material or the sulfur doping raw material and a nitrogen doping raw material with the carbon material, to form a mixture, then, pouring the mixture into water to form a uniformly-dispersed suspension; and drying the suspension to obtain a substance, grinding the substance, and then, calcining the substance in an inert gas atmosphere to obtain the sulfur-doped carbon material or the sulfur-nitrogen-doped carbon material. The preparation method is simple in operation and easy in mass production.

Description

technical field [0001] The present invention relates to the field of materials, in particular to a sulfur-assorted carbon material or a sulfur-nitrogen-assorted carbon material and a preparation method and application thereof. Background technique [0002] At present, the air electrodes of lithium-air batteries mostly use commercial carbon black (such as KB series, XC-72 and XC-72R, BP2000, etc.), self-made activated carbon, carbon aerogel, graphene and oxygen reduction catalyst as electrode materials. Among them, most of the self-made activated carbon and carbon aerogel have complex preparation processes and limited preparation quantities, which are not suitable for industrial production. The preparation process of graphene is complicated and difficult to prepare, which makes it expensive. Although commercial carbon black can be produced in large quantities, the price is moderate. However, the main problem on the air electrode side (that is, the positive electrode of lith...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/86H01M4/02H01M12/06
CPCY02E60/50Y02E60/128Y02E60/10
Inventor 刘现军王德宇
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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